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Table 37: Site Electrical Wiring Guidelines (continued)
GuidelinesSiteWiring Factor
If yoursite is susceptible toproblemswith electromagnetic
compatibility (EMC), particularlyfrom lightning or radio
transmitters,seek expert advice.
Someof the problemscausedby strongsourcesof
electromagneticinterference(EMI) are:
•
Destructionof the signal driversand receivers in the switch
•
Electricalhazards asa result of powersurges conducted
over the lines intothe equipment
Electromagneticcompatibility
Related Topics General Safety Guidelines and Warnings for EX Series Switches on page 263•
• GeneralElectrical Safety Guidelines and Warnings for EX Series Switcheson page 291
• Prevention of Electrostatic Discharge Damage on EX Series Switches on page 292
• Power Supply in EX2200 Switches
• Power Supply in EX3200 and EX4200 Switches
• AC Power Supply in EX4500 Switches
• AC Power Supply in an EX8200 Switch on page 40
• DC Power Supply in an EX8200 Switch on page 48
Environmental Requirements and Specifications for EX Series Switches
The switch must be installed in a rack or cabinet housed in a dry, clean, well-ventilated,
and temperature-controlled environment.
Ensure that these environmental guidelines are followed:
•
The site must be as dust-free as possible, because dust can clog air intake vents and
filters, reducing the efficiency of the switch cooling system.
•
Maintain ambient airflow for normal switch operation. If the airflow is blocked or
restricted, or if the intake air is too warm, the switch might overheat, leading to the
switch temperature monitor shutting down the switch to protect the hardware
components.
Table 38 on page 95 provides the required environmental conditions for normal switch
operation.
Table 38: EX Series Switch Environmental Tolerances
ToleranceDescription
No performance degradation to10,000feet(3048 meters)Altitude
95Copyright©2010, JuniperNetworks, Inc.
Chapter4:SitePreparation